Successful Organizational Change: Aligning Change Type With Methods,
2014
University of Central Florida
Successful Organizational Change: Aligning Change Type With Methods, Serina Al-Haddad
Electronic Theses and Dissertations
The motivation behind this research is the prevalence of challenges and ambiguity associated with successful organizational change and the numerous available approaches in dealing with these challenges and ambiguity. Many definitions and methods have been suggested to manage change; however, organizations still report a high failure rate of their change initiatives. These high failure rates highlight the continuing need for research and investigation, and imply a lack of a valid framework for managing successful organizational change. This dissertation critically reviews the concept of having one change approach as the “silver-bullet”. In pursuit of this goal, this research contributes a roadmap …
Inventory Management Problem For Cold Items With Environmental And Financial Considerations,
2014
University of Central Florida
Inventory Management Problem For Cold Items With Environmental And Financial Considerations, Ali Hajiaghabozorgi
Electronic Theses and Dissertations
The overarching theme of this dissertation is analytically analyzing the cold supply chain from a financial and environmental perspective. Specifically, we develop inventory policy models in the cold supply chain that consider holding and transportation unit capacities. The models provide insights for the decision maker on the tradeoff between setting order quantities based on the cost or the emission function. In Chapter 2, we review two major bodies of literature: 1) supply chain design, and 2) sustainability in supply chain design. We benefit from this literature review to map the current body of research on traditional supply chain for further …
A Framework For Assessing The Quality And Effectiveness Of A National Employment System: A Case Study Of Saudi Arabia,
2014
University of Central Florida
A Framework For Assessing The Quality And Effectiveness Of A National Employment System: A Case Study Of Saudi Arabia, Hemaid Alsulami
Electronic Theses and Dissertations
National employment systems have been established in several countries to tackle the unemployment dilemma between citizens while the labor market flooded by expatriates. Lack of performance measurement indices among these systems caused failure to provide jobs to citizens and caused a state of confusion and dissatisfaction among employing entities. In Saudi Arabia, unemployment rate has increased in the last few decades and have since become a very political issue for the Saudi government. Compared to other countries, the problem is different since many expatriates in Saudi Arabia are already employed in their markets while citizens are seeking jobs. In Saudi …
A Design And Analysis Of Computer Experiments-Based Approach To Approximate Infinite Horizon Dynamic Programming With Continuous State Spaces,
2014
University of Texas at Arlington
A Design And Analysis Of Computer Experiments-Based Approach To Approximate Infinite Horizon Dynamic Programming With Continuous State Spaces, Asama Kulvanitchaiyanunt
Industrial, Manufacturing, and Systems Engineering Dissertations - Archive
Dynamic programming (DP) is an optimization approach that transforms a complex problem into a sequence of simpler sub-problems at different points in stage. The original DP approach used Bellman's equation to compute the "cost-to-go' function. This method is useful when considering a few states and decisions. However, when dealing with high-dimensional data set with continuous state space, the limit called 'curse of dimensionality' obstructs the solution as the size of the state space grows exponentially. Given recent advances in computational power, approximate dynamic programming (ADP) is introduced by not seeking to compute the future value function exactly and at each …
Inventory Pooling In Petroleum Upstream Logistics Network,
2014
University of Texas at Arlington
Inventory Pooling In Petroleum Upstream Logistics Network, Sulaiman Hamad Al Jedaie
Industrial, Manufacturing, and Systems Engineering Dissertations - Archive
The petroleum industry is heading toward the era of efficiency and cost reduction. Oilfield service companies have to raise their efficiency to stay competitive. This dissertation explores the efficiency issues facing an existing upstream petroleum logistics network, with 30 products, 30 countries and two hubs, for an international Oilfield Service Company (OSC). Inventory control was found to be a main source for inefficiency. Safety stock was studied by implementing inventory pooling concept, joint ordering, demand outliers analysis, demand bucket size analysis and regional distribution centers.Six-sigma (DMAIC) approach was used to diagnose the issues in this network and propose alternative solutions. …
Unmanned Aerial Vehicle Routing In The Presence Of Threats,
2014
University of Texas at Arlington
Unmanned Aerial Vehicle Routing In The Presence Of Threats, Kamil A. Alotaibi
Industrial, Manufacturing, and Systems Engineering Dissertations - Archive
The use of Unmanned Aerial Vehicles (UAVs) and the importance of its role have evolved and increased recently in both civilian and military operations. In this research, we study the routing of Unmanned Aerial Vehicles (UAVs) in the presence of the risk of enemy threats. The main goal for this research is to find optimal routes that consider the targets visited, expected fuel burn, threat exposure, and travel time. We formulate two mixed integer linear programs. In first formulation, we minimize the total expected fuel burn for multiple UAVs in order to visit multiple targets while maintaining the total threat …
An Exploration And Exploitation Pareto Approach To Surrogate Optimization,
2014
University of Texas at Arlington
An Exploration And Exploitation Pareto Approach To Surrogate Optimization, John F. Dickson
Industrial, Manufacturing, and Systems Engineering Dissertations - Archive
The experiments or simulations conducted by computers can be a tedious task,requiring substantial computational time. To find a global solution using a computerexperiments process, we usually need to perform many function evaluations of thecomputer model. This research focuses on developing an optimization method to find aglobally optimal solution efficiently using surrogates. The surrogates represent thecomputer model or the system that reads the inputs and generates the output responsesof interest, so that these surrogate models can be used in place of time-consumingsimulations runs. In surrogate based optimization, we iteratively build a surrogate model(a.k.a, approximate model or a metamodel) and conduct an …
A Systems Thinking Approach To Apply Water Sustainability In Hospitals,
2014
University of Texas at Arlington
A Systems Thinking Approach To Apply Water Sustainability In Hospitals, Misagh Faezipour
Industrial, Manufacturing, and Systems Engineering Dissertations - Archive
One of the most critical challenges the world is facing is to ensure everyone has access to an adequate and quality supply of water. As the population increases, the demand for water rises. Water needs to be sustained for current and future generations. Sustainability acts to balance the resource supply and demand. Hospitals are a major consumer of water. Unfortunately water is facing the challenges of diminishing resources and increasing demands. Therefore, considering water sustainability in hospitals is of significant importance. Water sustainability in hospitals is also important since hospitals offer services to help people improve the quality and health …
Evaluating The Impact Of A Shared Pharmaceutical Supply Chain Model To Minimize Counterfeit Drugs, Diverted Drugs, And Drug Shortages,
2014
University of Texas at Arlington
Evaluating The Impact Of A Shared Pharmaceutical Supply Chain Model To Minimize Counterfeit Drugs, Diverted Drugs, And Drug Shortages, Jae Bong Choi
Industrial, Manufacturing, and Systems Engineering Dissertations - Archive
The pharmaceutical supply chain in the United States of America (USA) is getting complicated and is often not controllable due to a globally open market, increasing online market, and many illegal activities. Consumers who cannot afford to buy high priced genuine products are tempted by easily accessible counterfeit drugs on illegal web site pharmacies in or out of the USA. Many corrupt participants, such as wholesalers or pharmacies in the supply chain, take advantage of weak enforcement and a flawed drug supply chain for financial gain. The public health system and numerous patients are in, or could be in, painful …
Facility Capital Equipment And Labor Decision Support System Using A Discrete-Event Simulation And Bottleneck Detection Approach,
2014
University of Texas at Arlington
Facility Capital Equipment And Labor Decision Support System Using A Discrete-Event Simulation And Bottleneck Detection Approach, Mohammed Almansouri
Industrial, Manufacturing, and Systems Engineering Dissertations - Archive
Market demand is constantly changing. Therefore, it is critical for companies to be flexible and willing to adapt in order to remain competitive. This study will evaluate bottleneck detection techniques that have been identified in previous research by comparing the performance of each method on all case study models that can be replicated from the literature. The purpose of this analysis is to identify the most efficient and reliable bottleneck detection algorithm(s) which are capable of supporting constraint identification on a wide range of production system classes and configurations. The primary objective will be to identify a robust bottleneck detection …
Interpolation-Based Super-Resolution Reconstruction: Effects Of Slice Thickness,
2014
Wright State University - Main Campus
Interpolation-Based Super-Resolution Reconstruction: Effects Of Slice Thickness, Amir Pasha Mahmoudzadeh, Nasser H. Kashou
Biomedical, Industrial & Human Factors Engineering Faculty Publications
Standard clinical magnetic resonance imaging (MRI) is acquired in two-dimensions where the in-plane resolution is higher than the slice select direction. These acquisitions include axial, coronal, and sagittal planes. To date, there have been few attempts to combine the information of these three orthogonal orientations. This paper aims to take advantage of the different in-plane resolution acquired from each plane orientation and combine them into one volume in order to attain a higher resolution image. This combination of MRI data will allow the detection of smaller areas that would otherwise be missed using only one slice orientation. A comparison of …
An Unsupervised Consensus Control Chart Pattern Recognition Framework,
2014
University of Central Florida
An Unsupervised Consensus Control Chart Pattern Recognition Framework, Siavash Haghtalab
Electronic Theses and Dissertations
Early identification and detection of abnormal time series patterns is vital for a number of manufacturing. Slide shifts and alterations of time series patterns might be indicative of some anomaly in the production process, such as machinery malfunction. Usually due to the continuous flow of data monitoring of manufacturing processes requires automated Control Chart Pattern Recognition(CCPR) algorithms. The majority of CCPR literature consists of supervised classification algorithms. Less studies consider unsupervised versions of the problem. Despite the profound advantage of unsupervised methodology for less manual data labeling their use is limited due to the fact that their performance is not …
Phase I Monitoring With Applications In Manufacturing And Healthcare,
2014
University of Texas at Arlington
Phase I Monitoring With Applications In Manufacturing And Healthcare, Smriti Neogi
Industrial, Manufacturing, and Systems Engineering Dissertations - Archive
This research develops statistical methods for quality monitoring in complex systems. Quality monitoring typically consists of two phases called Phase I analysis (or offline monitoring) and Phase II analysis (or online monitoring). This research is focused on Phase I monitoring. Two application areas are considered, complex manufacturing processes and healthcare delivery processes. In the first application, a robust strategy for Phase I analysis of optical profiles in low-E glass manufacturing is developed. The proposed approach aims to solve the problems such as violation of normality, high dimensionality, detection of multiple change points, etc. It will provide a convenient process monitoring …
Study Of The Use Of A Genetic Algorithm To Improve Networked System-Of-Systems Resilience,
2014
Missouri University of Science and Technology
Study Of The Use Of A Genetic Algorithm To Improve Networked System-Of-Systems Resilience, Charles O. Adler, Cihan H. Dagli
Engineering Management and Systems Engineering Faculty Research & Creative Works
Large scale failures or degradation resulting from smaller initial failures or disruptions in networked system-of-systems are an issue in multiple areas - for example cascading failures in electrical power grids or large disruptions in national air traffic due to local or regional weather conditions. The system architecture can have a significant impact on system-of-systems susceptibility to large scale failures. The study presented in this paper uses a simple interdependent networked system-of-systems failure model, integrated into a unique objective function that addresses both the overall level of failure and the rate of failure progression, and a genetic algorithm to demonstrate an …
Identifying And Overcoming The Barriers To Sustainable Construction,
2014
Missouri University of Science and Technology
Identifying And Overcoming The Barriers To Sustainable Construction, Cristin Szydlik
Doctoral Dissertations
"Sustainable construction has become increasingly more prevalent over the last decade. All federal and most state government buildings are mandated to achieve Leadership in Energy and Environmental Design (LEED) certification (at the silver level at a minimum). Although sustainable construction is increasingly more common, there are still barriers to the successful completion of a sustainable project, specifically with regards to projects achieving LEED certification. There are still holes in the guidance on how to successfully achieve LEED certification. Even though government agencies have mandated LEED certification, the existing barriers are preventing buildings from achieving certification, which can delay the building …
การลดสิ่งแปลกปลอมในกระบวนการสร้างเส้นลายวงจรในโรงงานผลิตแผงวงจรไฟฟ้าชนิดอ่อน,
2014
คณะวิศวกรรมศาสตร์
การลดสิ่งแปลกปลอมในกระบวนการสร้างเส้นลายวงจรในโรงงานผลิตแผงวงจรไฟฟ้าชนิดอ่อน, ปิยะนันท์ สยนานนท์
Chulalongkorn University Theses and Dissertations (Chula ETD)
งานวิจัยนี้มีวัตถุประสงค์เพื่อลดปริมาณของเสียที่เกิดจากปัญหาสิ่งแปลกปลอมในกระบวนการสร้างเส้นลายวงจรในโรงงานผลิตแผงวงจรไฟฟ้าชนิดอ่อน โดยการประยุกต์ใช้แนวคิด ซิกซ์ ซิกมา งานวิจัยเริ่มจากการนิยามปัญหาสิ่งแปลกปลอมในกระบวนการสร้างเส้นลายวงจร การวัดเพื่อกำหนดสาเหตุของปัญหาได้เลือกปัจจัยนำเข้าหลักมาพิสูจน์ความมีนัยสำคัญ การวิเคราะห์สาเหตุของปัญหาโดยการประยุกต์ใช้การออกแบบการทดลองเชิงแฟคทอเรียลแบบ 2 ระดับ (2k Factorial Design) เพื่อศึกษาอิทธิพลของปัจจัยที่มีผลต่อการทำให้เกิดของเสีย โดยพบว่ามี 3 ปัจจัยหลักที่เกี่ยวข้องกับของเสียที่เกิดขึ้น คือ ความเข้มของแสง UV ในกระบวนการถ่ายเส้นลายวงจร ความเข้มข้นของสารละลายโซเดียมไฮดรอกไซด์ และอุณหภูมิของสารละลายโซเดียมไฮดรอกไซด์ในกระบวนการลอกลายเส้นลายวงจร ซึ่งเมื่อทําการทดลองเพื่อหาระดับปัจจัย สรุปได้ว่าระดับของปัจจัยที่เหมาะสมในการลดปัญหาสิ่งแปลกปลอม คือ ความเข้มของแสง UV 50 mJ/cm2 ในกระบวนการถ่ายเส้นลายวงจร อุณหภูมิของสารละลายโซเดียมไฮดรอกไซด์ 48°C และ ความเข้มข้นของสารละลายโซเดียมไฮดรอกไซด์ 3.5%wt ในกระบวนการลอกลายเส้นลายวงจร จากนั้นจึงกำหนดแผนการควบคุมตัวแปรต่างๆ โดยจัดทำเป็นมาตรฐานวิธีการปฏิบัติงาน ผลหลังการปรับปรุงพบว่าค่าเฉลี่ยของเสียลดลงจาก 0.27% เหลือเพียง 0.004% โดยการประเมินปริมาณการผลิตคาดว่ามูลค่าความสูญเสียจะลดลงได้ถึง 336,770 บาทต่อเดือน
Rheological Model Of Force Transmission Through The Helmet And Concussion Sensitivity,
2014
Wright State University - Main Campus
Rheological Model Of Force Transmission Through The Helmet And Concussion Sensitivity, Isiah Kendall, Anthony Vicini, Tarun Goswami
Biomedical, Industrial & Human Factors Engineering Faculty Publications
In contact sports, head-to-head collisions can lead to concussions, which pose serious health risks to players. This research aims to understand the force transfer from the helmet to the brain that causes concussions in collisions using a rheological model. Experimental data was gathered from players in the National Football League and testing of one type of helmet and padding. The rheological model was verified with published data and good correlation was achieved. Further sensitivity analysis of concussion risk was performed with respect to force, body weight, mass, and impact duration fit to normal and Weibull distributions using Monte Carlo simulations …
Positioning Automated Guided Vehicles In A General Guide-Path Layout,
2014
Universidad Panamericana
Positioning Automated Guided Vehicles In A General Guide-Path Layout, Abraham Mendoza, Jose A. Ventura
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
The locations of dwell points for idle vehicles in an automated guided vehicle (AGV) system determine the response times for pick-up requests and thus affect the performance of automated manufacturing systems. In this study, we address the problem of optimally locating dwell points for multiple AGVs in general guide-path layouts with the objective of minimizing the maximum response time in the system. We propose a mixed integer linear programming (MILP) formulation for the problem. We also develop a generic genetic algorithm (GA) to find near optimal solutions. The MILP model and GA procedure are illustrated using a two-dimensional grid layout …
Integrating Analysis Into A Warehouse Design Workflow,
2014
The Georgia Institute of Technology School of Industrial & Systems Engineering
Integrating Analysis Into A Warehouse Design Workflow, Leon Mcginnis, Timothy Sprock
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
Supply chain analyses, including those related to material handling systems, are typically purpose-built to answer specific questions and therefore have many different implementations depending on the question, the instance data, and the solver. The purpose-built nature of these models makes it difficult to integrate them into an iterative design workflow. Despite the myriad analysis implementations, the fundamental structure of these systems and their problem domain remains unchanged, suggesting that perhaps analyses could be automatically generated on demand, given an appropriate specification of the particular system to be analyzed. We apply model-based systems engineering (MBSE) methodologies to explore this possibility in …
Throughput Analysis Of S/R Shuttle Systems,
2014
University of Technology
Throughput Analysis Of S/R Shuttle Systems, Georg Kartnig, Jörg Oser
13th IMHRC Proceedings (Cincinnati, Ohio. USA – 2014)
Shuttle systems are used in high performance automated storage/retrieval unit load systems. Each storage level is serviced by one transfer car travelling in dual command operation. One buffer slot is located at both ends of each level. This decouples horizontal travel from vertical input/output moves, which in this case requires two independent vertical reciprocating lifts at each end of the aisle. Other systems work with only one lift used in lower throughput applications. The content of this paper is treated in the following sections starting with a problem definition and a literature survey. This is followed by a detailed functional …
